Regression models for provoking motion sickness in tilting trains

Modelling and prediction of motion sickness and nausea from vertical and horizontal accelerations have been investigated and developed through the combined efforts of many researchers. Vertical accelerations have been reported to have a strong influence on nausea, but less is known about the influence of roll motion. For tilting trains, where the tilt motion is used for reducing the lateral acceleration perceived by the passenger and thus improving comfort, it is likely that the primary cause of nausea is tilt motion in combination with low-frequency vertical and lateral acceleration.